Apple's App Store is nearing its 50 billionth download, so, to celebrate, Apple will be giving away a hefty prize to the lucky person who downloads that milestone app.

Apple's App Store is nearing its 50 billionth download, so, to celebrate, Apple will be giving away a hefty prize to the lucky person who downloads that milestone app.

On Thursday, Apple began its countdown to the 50 billionth app, which is rapidly ticking away over on the company's website. Should you download the 50 billionth app, you could win an App Store Gift Card worth $10,000 (£6,430).

Download one of the first 50 apps after the milestone has been reached and you could win a $500 App Store Gift Card.

Alongside the countdown, Apple has also published lists of the most popular apps in the history of the App Store. We're sharing the top five in the paid and free categories for both iPad and iPhone below. For the full lists, visit Apple's App Store.